PEESEKVATIVE LIQUIDS, WASHES, ETC. 75 



Tlie following is a modification of tlie above, useful for com- 

 parison as to relative strengths for injection and immersion : 



No. 13. — Wicker shehner' s Preserving Liquids, Nos. 2 and 3. 





For Injecting. 



For Immersing. 



Arsenions acid 



16 grams. 



12 grams. 



Sodium chloride 



80 „ 



60 „ 



Potassium sulphate 



200 „ 



150 „ 



,, Nitrate 



25 „ 



18 „ 



,, Carbonate 



20 „ 



15 „ 



Water 



10 litres. 



10 litres. 



Glycerine 



4 „ 



4 „ 



Wood naphtha 



f litre. 



1 litre. 



My friend, Dr. Priestley Smith, surgeon to the Birmingham 

 Eye Hospital, has kindly given me his formula for a process 

 which most admirably preserves delicate parts of animals. 

 Having been enabled to give him some eyes of rare animals 

 and fishes (whales and sharks), he showed me the process 

 which is now fully explained in the following extract from 

 the British Medical Journal of Jan. 10th, 1880 : 



Preservation of Ophthalmic Specimens. 

 Several friends and correspondents have asked me to refer them to a 

 description of the method which I employ for the preservation of oph- 

 thalmic specimens, examples of which were exhibited in the annual 

 museum of the Association in Cork last summer. I published an 

 account of it in the Birmingham Medical Review for July, 1878 ; but, 

 as several improvements have been effected since that time, I shall bo 

 greatly obliged by being allowed space in this journal for a brief de- 

 scription of my present method. 



No. 14. — Priestley Smith's Formula. 

 The following are the solutions, etc., employed : 1. Miiller's Fluid — 

 viz., bichromate of potash 1 part, sulphate of soda 1 part, water 100 

 parts ; 2. Hydrate of chloral and water, 1 in 20 ; 3. Glycerine and 

 water, 1 in 4; 4. Glycerine and water, 1 in 2 — i.e., equal parts; 5. 

 Glycerine-jelly — viz., best French gelatine 1 part, glycerine 6 parts, 

 water 6 parts, soak the gelatine in the water until swollen, then heat 

 and add the glycerine, add a few drops of a saturated solution of car- 

 bolic acid, and filter hot through white blotting-paper ; 6. A thick 

 white varnish made by mixing oxide cf zinc with copal varnish in a. 

 mortar. 



